Re^2: search position is getting reset after 'local'

[dave_the_m]

No, local is more close to this:

{
    $orig_value = \$x;
    *x = \$tmp_new_value;
    ....;
    *x = $orig_value;
}

and the OP has reported a genuine bug

Dave.

[Joost]

It's a bug, yes. I'm wondering what's wrong with local() then, since your equivalent does work as you would expect local to act:

$x = 'abc de';
$x =~ m/ /g;

print "1=",pos $x;
{
    $orig_value = \$x;
    *x = \$tmp_new_value;
    print " 2=".pos $x;
#    ....;
    *x = $orig_value;
}
print " 3=".pos $$orig_value;
print " 4=".pos $x;

output:

1=4 2= 3=4 4=4

[dave_the_m]

I'm wondering what's wrong with local() then, since your equivalent does work as you would expect local to act

It's to do with how magic attached to the value (eg pos magic) is sometimes copied to the new value, and sometimes copied back at the end. For example, a localised %ENV still needs to affect environment variables.

It's on my Big List of Things To Fix At Some Point.

Dave.